following tonight's speech, president obama leaves on a three-day tour to push his economic agenda. he's hoping to create enough public pressure to force a compromise on capitol hill. >> thank you very much. the nation's most valuable company will be represented at state of the union is apple ceo sits next to the first lady. >> good morning. if i were a guest at the state of the union, i'd already be lining up on the capitol steps. cook was in san francisco just until just a short time ago. he just finished speaking at an event for which we have no pictures, a goldman sachs investors event. we assume he got on a plane and was heading towards washington where he will sit near the first lady. last year, her guest was steve jobs' widow. one of the things the silicon valley will be listening for is any mention of immigration reform. a joint venture says half of all adults working in silicon valley who have college degrees are foreign born. so immigration is critical to the valley. in fact, if you take a closer look, if you narrow it down to the so-called stem workers, science, technolog